arch/arc/include/asm/unwind.h
arch/arm/include/asm/unwind.h
arch/ia64/include/asm/unwind.h
arch/microblaze/include/asm/unwind.h
arch/parisc/include/asm/unwind.h
arch/s390/include/asm/unwind.h
arch/um/include/asm/unwind.h
arch/x86/include/asm/unwind.h
tools/perf/util/unwind.h